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Title: Bioinspired ordered polymer-composites
Author: Shi, Y.
ISNI:       0000 0004 7223 8827
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2017
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In this project, clays including montmorillonite, laponite, Black Hills bentonite as well as kaolinite were used to fabricate the layered structure of nacre. A solution casting method was used to build the hierarchical nacre-like composite and in-situ photo polymerisation, vacuum impregnation and vacuum assisted filtration methods were employed for preformed clay sheets and polymers (methyl methacrylate, tri(ethyleneglycol) dimethacrylate, poly(propylene glycol) dimethacrylate as well as epoxy resin) to mimic the structure of nacre. XRD was used to indicate the intercalation of polymer and orientation function of clay sheets and SEM for microstructure detection. Tensile testing was used to investigate the properties of different volume fraction (40-70 vol. %) composites and the highest value 98 MPa came from 50 vol. % MMT/PVA composite. The mechanism of polymerisation of acrylic groups with clays present was analysed and redox polymerisation was introduced for the kaolinite/PMMA system. Kaolinite/ PMMA samples were tested via three points loading and a composite with flexural strength of (40 ± 20) MPa and flexural modulus of (30 ± 20) GPa was obtained.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available